ece475-l24 - ECE 475/CS 416 Computer Architecture Secure...

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ECE 475/CS 416 Computer Architecture - Secure Hardware Edward Suh C omputer S ystems L aboratory [email protected] ECE 475/CS 416 — Computer Architecture, Fall 2007 Prof. Suh Announcements Final Exam December 11th 9am PH101 Report conflicts by Today Course Review HW and Lab grading Check the website
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ECE 475/CS 416 — Computer Architecture, Fall 2007 Prof. Suh Review ISA + Environment = virtual machine (application level) ISA alone is not sufficient to write useful programs - needs I/O OS is responsible for I/O (system call) Hypervisor (Virtual Machine Monitor) layer implements sharing of real hardware resources by multiple OSes HW utilization, manageability, reliability, security, etc. Needs to virtualize CPU, memory, I/O How to support non-native ISAs Emulation, binary translation, dynamic translation, run-time HW emulation ECE 475/CS 416 — Computer Architecture, Fall 2007 Prof. Suh What Is Security? It could mean many things, but there are two many aspects Confidentiality of information Protect private or sensitive information from being revealed Integrity of information and computation Prevent information from illegally changed Only perform the functions that it is supposed to perform
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ECE 475/CS 416 — Computer Architecture, Fall 2007 Prof. Suh Security in Traditional Processors How do traditional microprocessors provide security? What are the security mechanisms in HW? HW + OS provides “isolation” for both confidentiality and integrity What does this approach assume?
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